A body takes T minutes to cool from `62^@C` to `61^@C` when the surrounding temperature is `30^@C`. The time taken by the body to cool from `46^@C` to `45.5^@C` is

A body takes T minutes to cool from 62^@C to 61^@C when the surrounding temperature is 30^@C . The time taken by the body to cool from 46^@C to 45^@C is

A body takes 4 min. to cool from 61^(@)C to 59^(@)C . If the temperature of the surroundings is 30^(@)C , the time taken by the body to cool from 51^(@)C to 49^(@)C is :

A body takes 5 minutes to cool from 90^(@)C to 60^(@)C . If the temperature of the surroundings is 20^(@)C , the time taken by it to cool from 60^(@)C to 30^(@)C will be.

A body takes, 4 minutes to cool from 100^(@)C to 70^(@)C , if the room temperature is 25^(@)C , then the time taken to cool from 70^(@)C to 40^(@)C will be

A metal sphere cools from 72^(@)C to 60^(@)C in 10 minutes. If the surroundings temperature is 36^(@)C , then the time taken by it to cool from 60^(@)C to 52^(@)C is

A body in laboratory takes 4 minutes to cool from 6 1 °C to 59 °C. If the laboratory temperature is 30° C, then the time taken by it to cool from 51 °C to 49 °C will be

It takes 10 minutes to cool a liquid from 61^(@)C to 59^(@)C . If room temperature is 30^(@)C then find the time taken in cooling from 51^(@)C to 49^(@)C .

A body cool from 90^@C to 70^@C in 10 minutes if temperature of surrounding is 20^@C find the time taken by body to cool from 60^@C to 30^@C . Assuming Newton’s law of cooling is valid.

A body cools from 50^(@)C to 40^(@)C in 5 min. The surroundings temperature is 20^(@)C . In what further times (in minutes) will it cool to 30^(@)C ?